Mechanical pan-extractor for balances.



W. HEUSSER.

MECHANICAL PAN EXTRACTOR FOR BALANCES.

APPLICATION FILED JULY 6, I915.

1,264,794. Patented Apr. 30, 1918.

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MECHANICAL PAN EXTRACTOR FOR BALANCES.

APPLICATION FILED JULY 6,1915. 1 ,264,794. Patented Apr. 30, 1918.

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Patented Apr. 30, 1918.

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A TTORNE Y WILFRID HEUSSER, 0F SALT LAKE CITY, UTAH.

MECHANICAL PAN-EXTRACTOR FOR BALANCES.

Specification of Letters Patent.

Patented Apr. 30, 1918.

Application filed July 6, 1915. Serial No. 38,287.

To all whom it may concern:

Be it known that I, VVILFRID Hnussnn, a citizen of Switzerland, and a resident of Salt Lake City, in the county of Salt Lake and the State of Utah, have invented a new and useful Mechanical Pan-Extractor for Balances, of which the following, together with the accompanying drawings, constitute a full, clear, and exact specification, such as will enable others skilled in the art to which this invention appertains to make and use the same.

My invention relates to a device for mechanically withdrawing and replacing the weight pan of a balance and its objects are First. To allow the weights to be placed in or taken out of a balance pan without opening the usual door of the balance case and thus causing a rush of air which seriously disturbs the equilibrium of the balanceand occasions a considerable loss of time on the part of the operator. 1

Second. To allow the usual door of the balance case to be kept continually closed except for the purpose of cleaning or adjusting the balance thus preventing much dust from getting into the case and onto the balance.

Third. To provide a neat, simple, compact and eficient device which'is not llable to get out of order.

Fourth. To so arrange the device that at no time will it be possible to injure the balance in the slightest degree through unskilled manipulation on the part of the operator.

In attaining my objects I cut a small open-.

in g into the sliding glass door which latter usually extends over the entire front of the balance case. This opening is just large enough to allow the pan on a suitable carrier to be passed through it, and normally the opening is covered by a hinged glass shutter which is held against its seat by a suitable spring. I

The weight pan is lifted from its hanger by means of a forked arm forming a carrier and which is mounted at one extremity on the top of a post capable of being elevated and lowered. The post in turn is mounted in a carriage which maybe pushed forward or backward by the operator.

Thus, the pan may be lifted off the hanger and be brought forward through the small shuttered opening ready to have any weight or weights taken therefrom or placed therein, then to be returned to its normal position after first depositing the pan in its hanger.

The collective features upon which protection is desired are grouped in the appended claims.

In the drawings Figure 1 represents a plan view, (partly v in section on line 11 in Fig. i) of my device as practically applied;

Fig. 2, the same as Fig. 1 but with the movable parts in an alternate position;

Fig. 3, a cross section taken partly on line 3 3 and partly on line 3 3 in Fig. 1;

Fig. 4, a front elevation of my device and a portion of the usual balance case;

Fig. 5, a section on line 5-5 in Fig. 3 and taken in the direction of the arrows but showing some parts in the foreground, in elevation.

Fig. 6, representsa section on line 66 in Fig. 4 and shows a modified construction of some parts;

Fig. 7, a section on line 77 in Fig. 6 taken in the direction of the arrows and showing some parts in elevation.

Fig. 8 a section on line 8-8 in Fig. 6;

Fig. 9, an elevation of a detail indicated by the arrow 9 in Fig. 3, and Fig. 10, a top plan view of a detailed part.

In all the different views similar parts are designated by similar numerals.

Referring to the drawings (11) represents a portion of the base of a balance supported by the usual feet (not shown) to the under side of which is attached a metallic tube (12) by means of the screws (13), the tube being preferably of square or oblong cross section. Inside the tube (12) which acts as a guide therefor, is the slidably disposed fiberblock or carriage (14). 1 A shaft (15) which may be rotated to a limited extent has the bearings (16) and (17) in the fiber block (1 1) and the bearing (18) in the head (19) the latter being fastened in the end of the tubing (12). The shaft (15) carries the knob (20), the toothed pinion (21), and the disk (22) all of which are rigidly mounted thereon. The shaft (15) extends beyond the front of the base (11) leaving the knob (20) on the outside of the base where it may be easily grasped by the hand of the operator. The disk (22) has a projecting concentric portion forming the offsets or stops (23) and (24) which are adapted to engage a pin (25) secured in the fiber block (14). A post (26) preferably of rectangular cross section and having the toothed rack portion (27) adapted to mesh with the pinion (21), is snugly fitted into the fiber block (14) and is adapted tosllde vertically through the hole (26*) with sufficicnt friction from the contact with the fiber to hold it positively at any point of itstravel. The fiber block (14) is most convenicntly made in two parts as shown in the top plan view of the same in Fig. 10,- each part having one-half of the hole (26*) and the recess (21*) therein. In its normal position the post (26 extends downwardly through a rectangular hole (28) in the bottom wall of the tubing (12).;and upwardly through slot in thebalance base (11). On its upper end the post (23) carries the rigidly attached fork or pan carrier (30) which extends forward from the post and terminates in the circular branches (31) from which project prongs and horns (33) the latter'having tips (34) of. cork or other suitable material. At (35) is represented the pan hanger having the threearmed griff (36) for holding the pan (37 as usually constructed in balances of my manufacture and which form no part of the present invention.

The prongs (32) are so located that 1n the normal; position of the fork (30) they will lie intermediate the three branches of the griff (36);, as shown in Fig. 1. Therefore, when'the fork (30) is elevated, the pan (37) will be lifted out of the grid to the position indicated by the dotted lines at (37*) in Fig. 3 and by the full lines at (37) in Fig. 5. When the fork is in the normal position shown in elevation at (30) in Figs. 3 and 4, it is located intermediate the pan (3'?) and the lower bar of thepan hanger (35), far enough'out of the way of either so not. to interfere with them during the vibration of the balance.

An opening, preferably circular in shape and bounded by a. suitable metallic frame (38): is located in the usual sliding glass door of the balance case, this opening having its center approximately level with the top of the pan when it is in the position indicated by the dotted lines at (37) in Figs. 3 and 4. The circular frame (38)- has a ring (40-) countersunk therein of cork or other suitable material flush with the outside face of frame and forming a seat for the metallic frame of the shutter (42) and which carries the glass (43). The shutt er has the hingea rms projecting from the frame (41E and these are pivoted at (45) tothel u-gs (46) which may be integral with the door frame A coil spring (48) encircles the pivot (45) and bears against one of the arms (44) thus keeping the shutter (42) normally closed.

In operating this device, assuming'the vari- 0115 parts to be normally positioned as shown by the full lines in Fig. 3, the knob (20) is turned inthe direction of thearrow shown in Fig. 4 until stopped by the offset (23) on disk (22') coming in contact with the pin (25) this positions the parts as indicated at (26 ),(30* )-and (37) in Figs. 3- and 4, and at (2(3) and (37) in Fig. 5. The bottom of post (26) now clears the bottom inside surface of the tube (12), and the operator by pulling on the knob (20) may bring the movable parts forward as indicated at (14 (20 (30 and (37) in Fig. 3, and at (14) (20-) (30) and (37) in Fig. 2, the glass (43) of the shutter (42) having meanwhile been contacted by the: tips 34) of the horns and the further movement of these parts having pushed the shutter (42) open to the position shown by (42) in Fig. 3 and by (42) in Fig. 2. V a

Any desired weights (not shown) may now be conveniently put into thepan and the pan be returned to the in the pan hanger by reversing the operation just described the shutter (42) being auto-matic'ally closed by the spring For the purpose of preventing air currents from entering the balance case and for the sake of appearance the slot (29); is provided with a sliding cover (49) preferably of metal with a strip (50') of velvet of other suitable meterial on its under side to make a close joint with the surface of base (11). The cover (49) fits tightly around the post (26); and moves forward and backward with it, keeping the slot (29 covered at all times as indicated in the drawings;

From an inspection of the drawings it will be that-at no time is it possible for the operator through carelessness or awkwardness to injure the balance while using this device because when the fork would be in conflict with the pan hanger horizontalilfy, the car-rage is prevented from bemoved forward by that portion of the post (26) below the bottom wall of the tube (12);, and the post (26) cannot be elevated nor depressed too much owing to the stops already described. )Vhe'n the fork would be inconfi'ict with the pan hanger (35-), vertically, the post (26) is prevented from being moved downwardly by its contact on the bottom of the tube ('12).

Figs. 6, 7 and 8- il l-ustrate modified means for moving the post up and down. In this instance (51) represents'the operating shaft, (20*) the knob, the sliding fiber block or carriage, and the post. The shaft (51) is journaled at and at (56) and carries the rigidly mounted crank disk (57) from which projects the pin (58 engaging one end of the connecting link (59'). The other end of the link (59;) is pivoted. at (60) tOFtlJB post ('54) and at (61) a collar is fas tened to the shaft (51.) to take the thrust when the shaft is pushed back. By turning the knob (20) in either direction the post (54') is elevated as shown by dotted lines in Figs. 7 and 8. In Fig. 7 an intermediate position of the link (59) is shown at (59) and its uppermost position at (59).

At (62) in Fig. 3 is shown a small hole for venting the space in tube (12) when the block (14:) is pulled forward.

Those parts shown in the drawings and to which no reference numeral is attached belong to one type of balances as manufactured by myself but they are in no way elements of the present invention.

While I have described a specific embodiment of my invention, the details thereof could be changed in many ways without departing from the spirit of this invention.

What I claim as new is 1. In a mechanical pan extractor for bal-' to be moved in the said guide, a post, movable in the carriage, means for reciprocating the carriage, means for reciprocating the said post in the said carriage, and a pan carrier mounted on the said post adapted to allow the operator to mechanically lift the usual balance pan out of its usual position and to bring the said pan to a suitable point of access for the operator.

2. In a mechanical pan extractor, the combin-ation with a balance structure having a case, of a guide suitably disposed, a carriage adapted to be moved back and forth in the said guide; a post, movable up and down in the said carriage; a pan-supporting arm projecting from the said post; a suitable door in the said balance case, and means for operating the said carriage and the said post for the purpose of projecting the said pansupporting arm through the said door to a position outside the said case.

3. In a mechanical pan extractor for balances, the combination with a suitable balance structure having a main door, of guides suitably disposed, a carriage adapted to be moved back and forth in the said guides; means, mounted on the said carriage, adapted to allow the operator to mechanically lift the usual balance pan out of its usual position; a suitable door in the main door of the balance case, means for mechanically projecting the said pan through the opening closed by the said door, thereby automatically opening the said door, and means for automatically closing the said door when the said carriage is moved backward in the said guides.

4. In the device described, the combination with a balance having a base, a pan hanger, a pan and a casing; of a rectangular, tubular guide secured to the under side of the said base, a block of suitable material slidably disposed in the said guide; a shaft j ournaled in the said block; a toothed pinion mounted on the said shaft; means for partially rotating the said shaft; a suitable postadapted to be held in an opening in the said block and having a rack portion engaged by the said toothed pinion; a forked arm projecting rigidly from the upper end of the said post and a spring pressed shutter covering an opening in the Walls of the said casing, the entire combination being so arranged that the turningof the said shaft will cause the said pan to be lifted out of the said pan hanger and a pull on the said shaft will bring the said pan to a suitable point outside the said casing.

5. In the device described, the combination with a balance having a base, a pan hanger, a pan and a casing; of a rectangular, tubular guide secured to the under side of the said base, a block of suitable material slidably disposed in the said guide; a shaft journaled in the said block; a toothed pinion mounted on the said shaft; means for partially rotating the said shaft; a suitable post adapted to be held in an opening in the said block and having a rack portion engaged by the said toothed pinion; a forked arm projecting rigidly from the upper end of the said post and a spring pressed shutter covering an opening in the Walls of the said casing, the entire combination being so arranged that the turning of the said shaft will cause the said pan to be lifted out of the said pan hanger and a pull on the said shaft will bring the said pan to a suitable point outside the said casing, the said door being so arranged that the forward travel of the said forked arm will cause the said shutter to be automatically opened and the retraction of the said arm will cause the said shutter to be automatically closed.

6. In a mechanical pan extractor for balances, a movable carriage, a pan carrier suitably supported thereon, the said pan carrier consisting of an arm, a forked portion projecting therefrom and prongs suitably located projecting from the said forked portion for the purpose specified. V

In testimony that I claim this invention as my own, I have signed my name hereto in the presence of two subscribing witnesses.

, VVILFRID I-IEUSSER.

Witnesses:

P. H. MALLINCKRODT, VVM. J. COWAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 11.6. 

